It took that long because there was a war between protestants and christians following Luther's writing of the 95 theses which was very gruesome. After this war subdued, the church was finally ready to accept peace.
The migration of the Bantu people throughout Southern half of Africa led to a diffusion of Bantu languages. Today the number of Bantu languages is estimated to be between 200 and 500 (the difference is based on the unclear distinction between a language and a dialect) and Bantu languages are spoken in a very vast area.
A primary source is told or written down by a person that experienced or saw the event. While, a secondary source is told or written by someone else
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Europe was not the only one that positively affected by Marco Polo's travels. Unsurprisingly, China, too, was affected in a positive manner. Marco Polo had introduced gunpowder to the Chinese. With trade between Europe and China, the Europeans were introduced to citrus fruits, spices, and other newly seen goods.
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